Honda's V-Twin range of engines are the cream of the crop, powering pressure washers, water pumps and commercial lawncare equipment.

The GX630 V-Twin can also be found in cultivators, agricultural equipment and generators as well as heavy-duty forestry and industrial industries.


The fuel economy of the GX630 V-Twin is similar to fuel injection, with the simplicity of carburetion ensuring that running this unit is easy on both your pocket and the environment.

It features a digital CDI ignition system with variable timing, as well as a forged steel crankshaft and insert style rod bearings for efficient operation. There's also a rev limiter to protect against damage from over-revving.

Add a two barrel inner-vent carburettor for more precise fuel metering and a 9.3:1 compression ratio, and you'll be generating high power output without the need for premium fuel.


The GX630's high capacity pump facilitates consistent oil delivery, and a handy oil alert will help protect your motor from running dry.

There's a dual cylindrical air filter, and a large diameter air intake on board for superior cooling.

The result is a long-lasting, high-performing and reliable engine.

ModelGX630 (GX630RHQZB3)
TypeAir cooled 4-stroke OHV petrol engine, 90° V-twin design, horizontal shaft
Bore & Stroke2 / 78 x 72 mm
Displacement688 cc
Compression Ratio9.3:1
Net Power

15.5 kW (20.8 HP) / 3 600 pm

Continuous Rated Power

10.5 kW (14.1 HP) / 3000rpm 12.0 kW (16.1 HP) / 3600rpm

Max Net Torque48.3Nm / 4.93kgfm / 2500rpm
Ignition SystemDigital CDI with variable ignition timing
Starting SystemElectric Start
Cooling SystemForced-Air
Fuel Consumption at Rated Power6.0 L/hr - 3600rpm
Recommended FuelUnleaded
Lubrication SystemFull-pressure
Descriptor Text

Without oil filter replacement: 1.5L
With oil filter replacement: 1.7L

Dry Weight44.4 kg approx.
Length405 mm
Width410 mm
Height438 mm